- In Peg Port config, I changed PCIEX16_1 Link Speed to "Gen2"
- In PCH Config/PCI Express Config, I changed PCIe Speed to "Gen2"
This settings you don´t need. I never changed PCIE to Gen2 or 1. All say we must do this, my rigs run well with Gen3 for several years.
Change riser even if it's new.